package com.wyd.utils;

import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

import java.io.IOException;
import java.io.InputStream;

/**
 * @author 文永达
 * @version 1.0
 * @time 2021/3/27 15:33
 * @see //TODO
 */
public class MybatisUtils {

    private static SqlSessionFactory sqlSessionFactory;

    static {
        String resource = "mybatis-config.xml";
        try {
            //使用Mybatis第一步：获取sqlSessionFactory对象
            InputStream inputStream = Resources.getResourceAsStream(resource);
            sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    //既然有了SqlSessionFactory，顾名思义，我们就可以从中获得SqlSession的实例了。
    //SqlSession 完全包含了面向数据库执行SQL命令所需的所有方法。
    public static SqlSession getSqlSession(){
        SqlSession sqlSession = sqlSessionFactory.openSession();
        return sqlSession;
    }

}
